JP6234968B2 - Fluid recovery and refilling equipment - Google Patents

Description

  The present invention relates to a fluid recovery / regeneration / filling apparatus.

  2. Description of the Related Art Conventionally, a fluid recovery / regeneration / filling device that performs a recovery / regeneration step of recovering refrigerant from a vehicle air conditioner and removing unnecessary machine oil, and then charging the regenerated refrigerant into the vehicle air conditioner (see, for example, Patent Document 1). was there.

JP 2012-117719 A

  Conventionally, before performing the above recovery and regeneration process, an air conditioner diagnosis device such as an air conditioner check pressure gauge is connected to the vehicle air conditioner, and the internal pressure is visually checked to diagnose whether the vehicle air conditioner is normal. It was. Therefore, it is necessary to own a fluid recovery / regeneration / filling device and an air-conditioning diagnostic device, and there is a problem that maintenance management takes time and cost. In addition, there is a problem that it takes time and effort to prepare and operate the diagnosis work and the fluid recovery / refilling work.

  Accordingly, an object of the present invention is to provide a fluid recovery / regeneration / filling apparatus that can easily and quickly perform diagnosis work and fluid recovery / regeneration / filling work without having to own an air-conditioning diagnosis apparatus.

In order to achieve the above object, the fluid recovery / regeneration / filling device of the present invention performs a recovery / regeneration step of recovering and regenerating the refrigerant from the vehicle air conditioner, and then fills the vehicle air conditioner with the recovered and regenerated refrigerant. In the recovery / regeneration / filling device, the recovery / refilling device includes a diagnosis unit that determines whether the vehicle air conditioner is in a normal state or an abnormal state before the recovery / regeneration step and displays a determination result, and the diagnosis unit measures the outside air temperature. An outdoor air temperature sensor, a high pressure side pressure sensor for measuring the pressure in the high pressure side pipe of the vehicle air conditioner, a low pressure side pressure sensor for measuring the pressure in the low pressure side pipe of the vehicle air conditioner, The diagnostic means performs a normal value range determination process for determining a predetermined high pressure normal value range and a predetermined low pressure normal value range according to the outside air temperature based on the measurement result of the outside air temperature sensor, and Up When the pressure in the low pressure side pipe of the vehicle air conditioner is lower than the predetermined low pressure normal value range and the pressure in the high pressure side pipe of the vehicle air conditioner is lower than the predetermined high pressure normal value range, refrigerant displayed is determined and attention state that may be improved by filling recovery and recycling to the upper Symbol diagnosis means for detecting whether there is condensation on the surface of the low-pressure side pipe And the diagnostic means further comprises a pressure in the low pressure side pipe of the vehicle air conditioner that is higher than the predetermined low pressure normal value range and a pressure in the high pressure side pipe of the vehicle air conditioner. Is higher than the predetermined high-pressure normal value range, if it is determined that there is no condensation on the surface of the low-pressure side pipe based on the detection result of the moisture sensor, the caution state is determined and displayed.

Further, the diagnostic means includes a display unit for visually confirming the determination result, and the display unit is turned on when the first lamp is turned on or blinking when the normal state is determined and when the attention state is determined. or a second lamp flashes, Ru der those and a third lamp that lights or blinks when it is determined that the abnormal state.

  According to the present invention, it is possible to perform an air conditioning diagnosis operation of a vehicle air conditioner and a fluid recovery regeneration filling operation with a single fluid recovery / regeneration / filling device, and it is not necessary to own an air-conditioning diagnosis device. And cost can be reduced. Depending on the work, there is no need to use the air conditioning diagnostic device and the fluid recovery / regeneration / filling device separately, and the diagnosis work and the fluid recovery / regeneration / filling operation can be performed easily and quickly. Diagnosis can be made easily and accurately without being an expert.

It is a front view which shows one Embodiment of this invention. It is a flowchart figure for demonstrating a state determination process. It is a flowchart figure for demonstrating a state determination process. It is a flowchart figure for demonstrating a state determination process. It is a flowchart figure for demonstrating a state determination process and a determination display process.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIG. 1, a fluid recovery / regeneration / filling device according to the present invention includes a high-pressure hose 11 having a high-pressure joint member 11 a detachably attached to a high-pressure side service valve of a vehicle air conditioner (car air conditioner), A low pressure hose 12 having a low pressure joint member 12a detachably attached to a low pressure side service valve of the vehicle air conditioner, and a recovery tank T for storing refrigerant (fluid) recovered from the vehicle air conditioner; A refrigerant (fluid) filled in the vehicle air conditioner is recovered, and a recovery and regeneration process is performed to remove oil from the oil-mixed refrigerant. After the regenerated refrigerant is stored in the recovery tank T, the vehicle air conditioner is charged. Is for.

  Although not shown, a plurality of oil charge valves that can be connected to an oil can, a charge valve for a supplementary refrigerant that can be connected to a supplementary refrigerant can, a base end side of a high-pressure hose 11, and a low-pressure hose 12 Control of a CPU, sequencer, etc. for controlling controlled members such as a piping circuit unit connected to the base end side and having a solenoid valve and a check valve, a vacuum pump, and each solenoid valve and compressor of the piping circuit unit The main body casing 10 includes a control unit and an operation unit such as a button or a touch panel for sending an instruction signal to the control unit.

  The piping circuit portion includes a first piping portion connected to the proximal end side of the high pressure hose 11, a second piping portion connected to the proximal end side of the low pressure hose 12, a first piping portion and a second piping. Oil supply connecting the merging pipe part connected to the part through the merging part, the recovery and regeneration piping circuit part connected to the merging pipe part and connected to the recovery tank T, and the oil charge valve and the merging pipe part Regeneration in which one end side is connected in the recovery tank T and the other end side is connected to the proximal end side of the high-pressure hose 11 while the piping portion, the supplementary refrigerant charge valve and the merging piping portion are connected. And a refrigerant filling pipe part.

  The recovery and regeneration piping circuit section separates the refrigerant fluid mixed with oil (refrigerator oil) recovered from the vehicle air conditioner into oil and refrigerant, liquefies the refrigerant from which the oil has been separated, and sends it to the recovery tank T Specifically, the circuit includes an oil separator, a dry filter, a compressor, a heat exchanger (condenser), and a liquefier (fin condenser). Moreover, foreign substances such as dust can be removed.

  Furthermore, the fluid recovery / regeneration / filling device of the present invention is a diagnostic means for determining the vehicle air conditioner state into three states: a normal state, an abnormal state, and a caution state described later, and displaying the determination result. It has.

  Further, the diagnostic means includes a display unit 5 for displaying the determination result, a calculation processing unit 6 such as a CPU or a microcomputer for performing a state determination process for determining the state of the vehicle air conditioner based on the measurement result from each sensor E, and the like. And a storage unit 7 such as a RAM or ROM capable of storing measurement results, determination results, and the like, a flash memory, and a hard disk (HD).

  The arithmetic processing unit 6 needs to be repaired or inspected when the vehicle air conditioner is in a normal state, meaning that there is no problem even if the recovery and filling process (work) is performed, and when the vehicle air conditioner is in an abnormal state. An abnormal condition that means that there is a possibility that the vehicle air conditioner is defective (but not normal) and may be improved to a normal condition by collecting and regenerating and filling the refrigerant (performing the recovery and recharging process) A state determination process is performed for determining the attention state (improveable state). Further, determination display processing for displaying the determination result on the display unit 5 is performed.

The display unit 5 is provided in the main body casing 10 and is a blue or green first lamp 51 that lights or blinks when it is determined to be in a normal state, and a yellow second lamp 52 that lights or blinks when it is determined as a caution state. And a red third lamp 53 that lights or blinks when it is determined that the state is abnormal.
The display unit 5 may be provided with a liquid crystal monitor that displays measurement results, determination results, and the like as diagnostic contents using text (comments), numbers, and charts.
It is also desirable to provide a printer (print output means) capable of printing the diagnostic content on a recording sheet and outputting it.

  Further, the diagnostic means includes an outside air temperature sensor E1 for measuring the outside air temperature in the vicinity of the main body casing 10, a high pressure side pressure sensor E2 for measuring the pressure (internal pressure) in the high pressure side pipe of the vehicle air conditioner, and the vehicle. Low-pressure side pressure sensor E3 for measuring the pressure (internal pressure) in the low-pressure side piping of the air conditioner, piping temperature sensor E4 for measuring the surface temperature of the low-pressure side piping, and low-pressure side measured by the piping temperature sensor E4 A comparative temperature sensor E40 for measuring the outside air temperature in the vicinity of the pipe and a moisture sensor E5 for detecting whether or not there is condensation on the surface of the low-pressure side pipe are provided.

The arithmetic processing section 6 determines a normal value range that determines a predetermined high pressure normal value range and a predetermined low pressure normal value range according to the outside air temperature based on the measurement result of the outside air temperature sensor E1 provided in the main body casing 10. Process.
In other words, if the high-pressure side piping of the vehicle air conditioner is normal at the measured outside temperature, the pressure range of the internal pressure (refrigerant pressure) of the high-pressure side piping should be within the measured outside temperature. The internal pressure (refrigerant pressure) should be stored in the storage unit 7 in advance. In other words, the temperature and the appropriate pressure normal value range (temperature and pressure normal value) are associated with each other and stored in the storage unit 7 so that the calculation processing unit 6 can calculate or extract them.

The predetermined high-pressure normal value range and low-pressure normal value range depending on the outside air temperature may vary depending on the vehicle manufacturer, vehicle type, refrigerant, etc. For example, when the refrigerant is HFC-134a gas, the outside air temperature is 10 ° C. If present, the high pressure normal value range is 0.54 to 0.64 Mpa, and the low pressure normal value range is 0.04 to 0.08 Mpa. If the outside air temperature is 15 ° C., the high pressure normal value range is 0.69 to 0.93 Mpa, and the low pressure normal value range is 0.06 to 0.13 Mpa. If the outside air temperature is 20 ° C., the high pressure normal value range is 0.98 to 1.27 Mpa, and the low pressure normal value range is 0.08 to 0.18 Mpa. If the outside air temperature is 25 ° C., the high pressure normal value range is 1.27 to 1.67 Mpa, and the low pressure normal value range is 0.11 to 0.23 Mpa. If the outside air temperature is 30 ° C., the high pressure normal value range is 1.44 to 1.96 Mpa, and the low pressure normal value range is 0.14 to 0.27 Mpa. If the outside air temperature is 35 ° C., the high pressure normal value range is 1.86 to 2.25 Mpa, and the low pressure normal value range is 0.17 to 0.31 Mpa. When the outside air temperature is 40 ° C. , the high pressure normal value range is 2.25 to 2.65 Mpa, and the low pressure normal value range is 0.20 to 0.39 Mpa.
Alternatively, a predetermined high-pressure normal value range according to the outside air temperature is set to a numerical range in which, for example, when the refrigerant is HFC-134a gas, the outside air temperature (° C.) value is about 1/25 to about 1/15. The unit may be megapascal (MPa).
The predetermined low pressure normal value range corresponding to the outside air temperature, for example, if the refrigerant is HFC-134a gas, the value of the outside air temperature (° C.), the numerical value range of about 1/270 to 1/100, The unit may be megapascal (MPa).

  The high pressure side pressure sensor E2 is provided in the main body casing 10, and is connected to the high pressure side piping of the vehicle air conditioner by connecting the high pressure joint member 11a of the high pressure hose 11 to the high pressure service valve of the vehicle air conditioner. The internal pressure of the internal piping of the casing 10 or the internal pressure of the high pressure hose 11 is measured.

  Based on the measurement result of the high pressure side pressure sensor E2, the arithmetic processing unit 6 determines whether or not the pressure is within the high pressure normal value range, and determines whether it is higher or lower than the high pressure normal value range.

  The low pressure side pressure sensor E3 is provided inside the main body casing 10, and is connected to the low pressure side piping of the vehicle air conditioner by connecting the low pressure joint member 12a of the low pressure hose 12 to the low pressure service valve of the vehicle air conditioner. The internal pressure of the internal piping of the casing 10 or the hose 12 for low pressure is measured.

  Based on the measurement result of the low pressure side pressure sensor E3, the arithmetic processing unit 6 determines whether it is within the low pressure normal value range, determines whether it is higher or lower than the low pressure normal value range, and within a predetermined time. It is determined whether or not the measurement pressure changes between the low pressure normal value range and the negative pressure, and whether or not the internal pressure is positive (negative).

The pipe temperature sensor E4 is provided integrally with a temperature sensor attachment such as a clip member that can be attached to and detached from the low-pressure side pipe of the vehicle air conditioner, and the temperature sensor attachment is attached to the low-pressure side pipe. This makes it possible to measure the surface temperature of low-pressure piping.
The comparison temperature sensor E40 is provided in the vicinity of the pipe temperature sensor E4. When the sensor mounting tool is attached to the low-pressure side pipe, the outside air in the vicinity of the low-pressure side pipe is provided so that it can be measured.

The arithmetic processing unit 6 determines whether or not the measurement result of the pipe temperature sensor E4 is higher (higher or lower) than the measurement result of the comparative temperature sensor E40.
Alternatively, the storage unit 7 stores the outside air temperature in the vicinity of the main body casing 10 and the comparison reference temperature in advance in association with each other, and the arithmetic processing unit 6 determines the comparison reference temperature based on the outside air temperature in the vicinity of the main body casing 10 and determines it. You may provide so that it may determine whether the measurement result of the piping temperature sensor E4 is higher than comparison reference temperature.

The moisture sensor E5 is provided integrally with a moisture sensor attachment such as a clip member that can be attached to and detached from the low-pressure side piping of the vehicle air conditioner, and the moisture sensor attachment is attached to the low-pressure side piping. It is provided so that moisture (frost, water droplets, etc.) on the surface of the low-pressure side pipe can be detected (measured).
Based on the detection result (measurement result) of the moisture sensor E5, the arithmetic processing unit 6 determines whether moisture is attached to the surface of the low-pressure side pipe, that is, whether condensation is present.

  The pipe temperature sensor E4, the comparative temperature sensor E40, and the moisture sensor E5 are provided on the distal end side of the cord member protruding from the main body casing 10 so as to be connectable to the vehicle air conditioner.

Next, the usage method (action) and processing of the fluid recovery / regeneration / filling apparatus of the present invention will be described.
First, the high pressure joint member 11a of the high pressure hose 11 is connected to the high pressure service valve of the vehicle air conditioner, and the low pressure joint member 12a of the low pressure hose 12 is connected to the low pressure service valve of the vehicle air conditioner.

Then, the air conditioning diagnosis process is started before the recovery and regeneration process for recovering and regenerating the refrigerant from the vehicle air conditioner.
In the air conditioning diagnosis process, the outside air temperature sensor E1 measures the outside air temperature in the vicinity of the main casing 10. Further, the high pressure side pressure sensor E2 measures the internal pressure of the high pressure side pipe, and the low pressure side pressure sensor E3 measures the internal pressure of the low pressure side pipe.
The arithmetic processing unit 6 performs normal value range determination processing for determining a high pressure normal value range and a low pressure normal value range based on the measured outside air temperature.

Next, as shown in FIGS. 2 to 4, a state determination process and a determination display process are performed.
Note that * 1 in Figure 2 follows * 1 in Figure 3, * 2 in Figure 2 follows * 2 in Figure 4, * A and * C in Figure 2, * B and * C in Figure 3, and Figure 4 * B and * C are followed by * A, * B, and * C in FIG. 5, respectively.
Further, numerals “S1” and “S12” such as the numbers “first” and “12th” of the names of the steps are given for ease of explanation and mean the order of processing. It is not a thing.

First, a processing route when the vehicle air conditioner is in a normal state will be described.
In the first step S1 of FIG. 2, it is determined whether or not the internal pressure of the low pressure side pipe changes between the low pressure normal value range and the negative pressure within a predetermined time. Since it does not change (No), the process proceeds to the second step S2.

In the second step S2, it is determined whether or not the internal pressure of the low-pressure side pipe is within the normal low pressure range. Since it is within the range (Yes), the process proceeds to the third step S3.
In the third step S3, it is determined whether or not the internal pressure of the high pressure side pipe is within the high pressure normal value range. Since it is within the range, the process proceeds to * A in FIG. The normal state is determined and the first lamp 51 is turned on.

  The user can confirm that the vehicle air conditioner is normal. Subsequently, the refrigerant is recovered from the vehicle air conditioner and regenerated, and then a recovery and recharging process (operation) is performed in which the recovered and regenerated refrigerant is charged.

  Next, if the vehicle air conditioner is faulty (not normal), it means that there is a possibility that it can be improved to a normal state by collecting and regenerating and filling the refrigerant (performing the recovery and recharging and filling process). The determination route will be described.

The process proceeds from the first step S1 of FIG. 2 to the second step S2, and since the internal pressure of the low-pressure side pipe is not within the low pressure normal value range (No), the process proceeds to the fourth step S4.
In the fourth step S4, since the internal pressure of the low-pressure side pipe is lower than the low-pressure normal value range, the process proceeds to * 1 in FIG.

In the fifth step S5 of FIG. 3, since the internal pressure of the high-pressure side pipe is not within the high-pressure normal value range (No), the process proceeds to the sixth step S6.
In the sixth step S6, since the internal pressure of the high-pressure side pipe is lower than the high-pressure normal value range, the process proceeds to the seventh step S7.
In the seventh step S7, the process proceeds to * B in FIG. 5 regardless of whether the internal pressure of the low-pressure side pipe is positive or negative.
Then, in the twelfth step S12 of FIG. 5, since it is before the recovery and regeneration process (that is, because it is the first air conditioning diagnosis process before the recovery and regeneration filling process), it is determined to be a caution state, and the second lamp 52 is turned on. Let

Here, in the seventh step S7 of FIG. 3, when the internal pressure of the low-pressure side pipe is positive (Yes), the internal pressure of both the high-pressure side pipe and the low-pressure side pipe is lower than the normal value range, and The internal pressure of the low pressure side pipe is positive.
In such a state (symptom), there is a possibility that the charging amount of the refrigerant is small or the refrigerant is leaking. That is, if the charging amount of the refrigerant is small, the refrigerant is charged in an appropriate amount in the recovery / regeneration / filling step, so that the normal state may be improved by performing the recovery / regeneration / filling step.

In the seventh step S7 of FIG. 3, when the internal pressure of the low-pressure side pipe is negative (No), the internal pressure of both the high-pressure side pipe and the low-pressure side pipe is lower than the normal value range and low The internal pressure of the side pipe is a negative pressure.
In such a state (symptom), there is a possibility that the air conditioner cycle is clogged due to freezing or adhesion of dust.
That is, since the refrigerant is regenerated in the recovery / regeneration / filling step (passes through a filter or the like to remove foreign matter), there is a possibility that the normal state is improved by performing the recovery / regeneration / filling step.
That is, the lamps to be turned on are the same regardless of the determination in the seventh step S7 (positive pressure or negative pressure), but the diagnostic contents (comments) are displayed when the diagnostic contents are displayed on the liquid crystal monitor or printed out. , Charts, and numerical values) can be made different, and more detailed diagnosis contents can be confirmed by the worker or vehicle user.

Next, another processing route for determining the attention state will be described.
From the first step S1 in FIG. 2, the process proceeds to the fourth step S4 through the second step S2.
In the fourth step S4, since the internal pressure of the low-pressure side pipe is higher than the low-pressure normal value range, the process proceeds to the eighth step S8.
In the eighth step S8, since the internal pressure of the high pressure side pipe is not within the high pressure normal value range (No), the process proceeds to * 2 of FIG.

In the ninth step S9 of FIG. 4, the internal pressure of the high-pressure side pipe is higher than the high-pressure normal value range, so the process proceeds to the tenth step S10.
In the tenth step S10, since the surface temperature of the low-pressure side pipe is higher than the outside air temperature (or a predetermined comparison reference temperature) in the vicinity of the low-pressure side pipe (Yes), the process proceeds to * B in FIG.
Then, since it is before the collection / regeneration / filling step (because it is the first air-conditioning diagnosis step), it is determined to be a caution state and the second lamp 52 is turned on.

That is, the internal pressure of both the high-pressure side pipe and the low-pressure side pipe is higher than the normal value range, and the temperature of the low-pressure side pipe is high (not cool).
In such a state, there is a possibility that air is mixed in the air conditioner cycle.
That is, since air is hardly mixed when the refrigerant is charged in the recovery / regeneration / filling step, there is a possibility that the normal state can be improved by performing the recovery / regeneration / filling step.

Further, in the tenth step S10 of FIG. 4, when the surface temperature of the low pressure side pipe is not higher than the outside air temperature (or the predetermined reference temperature) in the vicinity of the low pressure side pipe (No), the process proceeds to the eleventh step S11. .
In the eleventh step S11, when there is no condensation in the low-pressure side piping, the process proceeds to * B in FIG. Then, since it is before the recovery / regeneration step (recovery / regeneration / filling step), it is determined as a caution state, and the second lamp 52 is turned on.

That is, the internal pressure of both the high-pressure side pipe and the low-pressure side pipe is higher than the normal value range, the temperature of the low-pressure side pipe is low, and there is no condensation.
In such a state (symptom), there is a possibility that the charging amount of the refrigerant is large or the capacity of the capacitor is lowered.
In other words, if the charging amount of the refrigerant is large, the refrigerant is charged in an appropriate amount in the recovery / regeneration / filling step, so that the normal state may be improved by performing the recovery / regeneration / filling step.

2 to 4, the state where the processing route advances to * C is determined as an abnormal state as shown in FIG. 5, and the second lamp 52 is turned on.
For example, in the eleventh step S11, if there is condensation on the low-pressure side piping, the process proceeds to * C in FIG. The abnormal state is determined and the second lamp 52 is turned on.
That is, the internal pressure of both the high-pressure side piping and the low-pressure side piping is higher than the normal value range, the temperature of the low-pressure side piping is low, and frost and water droplets are attached to the low-pressure side piping.
In such a state (symptom), there is a possibility that pressure adjustment with the expansion valve is not properly performed.
In other words, the possibility of improvement to the normal state by performing the recovery / regeneration / filling step is very low, and repair / inspection is required.

Further, in the first step S1 of FIG. 2, when the internal pressure of the low pressure side pipe changes between the low pressure normal value range and the negative pressure (Yes), the process proceeds to * C of FIG. The abnormal state is determined and the third lamp 53 is turned on.
In such a state (symptom), there is a possibility that moisture is mixed in the air conditioner cycle and the expansion valve is frozen. In other words, the possibility of improvement to the normal state by performing the recovery / regeneration / filling step is very low, and repair / inspection is required.

Further, in the ninth step S9 of FIG. 4, when the internal pressure of the high-pressure side pipe is lower than the high-pressure normal value range, the process proceeds to * C of FIG. 5 to determine an abnormal state and turn on the third lamp 53.
Such a state (symptom) may be defective in the compressor of the vehicle air conditioner.
In other words, the possibility of improvement to the normal state by performing the recovery / regeneration / filling step is very low, and repair / inspection is required.
In addition, when it determines with an abnormal state, it is desirable to provide so that performing a collection | recovery reproduction | regeneration filling process may be prohibited (impossible).

Then, after determining the attention state, the user operation unit at a predetermined steering Sakuiki Ukoto, recovery and recycling filling process is started.
The refrigerant is recovered from the vehicle air conditioner to remove foreign matters and regenerated (collection regeneration process), and the vehicle air conditioner is charged with appropriate amounts of the regenerated refrigerant and the supplementary refrigerant (filling process).

Then, after the collection / regeneration / filling step, the air conditioning diagnosis step is started again (second time), and normal value range determination processing, state determination processing, and determination display processing are performed.
In the second state determination process, if the processing route continues to * B in FIG. 5, it is not before (but after) the recovery / recharging / filling step, so it is determined as an abnormal state and the third lamp 53 is turned on.
That is, the recovery / recharging / filling process (work) is performed after determining the caution state, but it is determined (diagnosis) that the problem has not been improved, and repair / inspection is required.

  Note that the flowcharts shown in FIGS. 2 to 5 are examples of the processing order, and the order (process) of each step may be changed. For example, after determining whether or not the high-pressure side pipe is within the high-pressure normal value range, it may be determined whether or not the low-pressure side pipe is within the normal value range. Alternatively, the temperature of the low-pressure side pipe may be determined after determining the condensation of the low-pressure side pipe. Further, the seventh step S7 may be omitted.

Although not shown in the figure, it may be determined that the state of caution is present when it is lower than the predetermined high-pressure normal value range and outside the predetermined low-pressure normal value range.
Also, some of the routes toward * C in FIG. 5 may be configured to be directed to * B in FIG. That is, in FIG. 2 to FIG. 4, some * C may be replaced with * B. For example, the “No” route in the third step S3 in FIG. 2, the “Yes” route in the eighth step S8, the “Yes” route in the fifth step S5 in FIG. 3, the sixth step S6. The “high” route of FIG. 4 and the “low” route of the ninth step S9 in FIG. 4 are processed so as to follow the * B in FIG. good.

  In the present invention, an in-vehicle temperature sensor that can be changed in design and can be disposed (attached) in the vicinity of an air-conditioning outlet in the upper front part (dashboard) of the vehicle interior is used to diagnose the in-vehicle temperature. An element (parameter) may be used. Each lamp 51, 52, 53 may be blinked, and the color is also free. Further, the sensor attachments for the pipe temperature sensor E4 and the moisture sensor E5 are not limited to the clip type (clothespin type), but may be a wrapping belt type or the like.

  As described above, the fluid recovery / regeneration / filling apparatus of the present invention performs the recovery / regeneration step of recovering and regenerating the refrigerant from the vehicle air conditioner, and then fills the vehicle air conditioner with the recovered and regenerated refrigerant. In this case, the vehicle air conditioner is equipped with a diagnostic means for determining whether the vehicle air conditioner is in a normal state or an abnormal state before the recovery and regeneration process and displaying the determination result. Diagnosis work and fluid recovery and refilling work can be performed, and it is not necessary to own an air-conditioning diagnosis apparatus, and maintenance work and costs can be reduced. Depending on the work, there is no need to use the air conditioning diagnostic device and the fluid recovery / regeneration / filling device separately, and the diagnosis work and the fluid recovery / regeneration / filling operation can be performed easily and quickly. Even a non-expert can obtain a reliable and accurate diagnosis result.

  Further, the diagnostic means, when the pressure in the high pressure side pipe of the air conditioner is lower than a predetermined high pressure normal value range, and the pressure in the low pressure side pipe of the air conditioner is lower than a predetermined low pressure normal value range, Since it is displayed as a warning state that there is a possibility that it can be improved by recovering and refilling the refrigerant, the recovery and recharging process can be performed after the air conditioning diagnosis process to improve the malfunction, and the frequency of repairs and inspections can be reduced. Can be reduced. Symptoms (states) that are difficult to judge can be diagnosed based on objective data (measurement results), and accurate and detailed diagnosis can be performed without experience or knowledge.

  Further, the diagnosis means is configured such that the pressure in the high-pressure side pipe of the air conditioner is lower than a predetermined high-pressure normal value range, and the pressure in the low-pressure side pipe of the air-conditioner deviates from the predetermined low-pressure normal value range. In this case, it is determined that there is a possibility that it can be improved by recovering and refilling the refrigerant. The frequency of inspection can be reduced. Symptoms (states) that are difficult to judge can be diagnosed based on objective data (measurement results), and accurate and detailed diagnosis can be performed without experience or knowledge.

  Moreover, the diagnostic means includes a display unit 5 for visually confirming the determination result, and the display unit 5 is turned on or blinked when it is determined to be in a caution state and a first lamp 51 that is lit or blinked when it is determined as a normal state. Since the second lamp 52 that blinks and the third lamp 53 that lights or blinks when it is determined to be in an abnormal state are provided, the diagnosis result can be easily visually confirmed, and work efficiency can be improved. Further, the manufacturing can be easily and quickly performed.

  The diagnostic means includes an outside air temperature sensor E1 for measuring the outside air temperature, a high pressure side pressure sensor E2 for measuring the pressure in the high pressure side pipe of the vehicle air conditioner, and a low pressure side pipe of the vehicle air conditioner. A low pressure side pressure sensor E3 for measuring pressure, a pipe temperature sensor E4 for measuring the surface temperature of the low pressure side pipe, and a moisture sensor E5 for detecting whether or not there is condensation on the surface of the low pressure side pipe Therefore, the vehicle air conditioner can be determined with various parameters (elements), and the state (symptoms) can be analyzed in detail, and appropriate and accurate diagnosis (determination) can be performed. It is possible to determine a delicate attention state (improveable state) between a normal state and an abnormal state.

5 display section
51 1st lamp
52 Second lamp
53 3rd lamp E1 Outside temperature sensor E2 High pressure sensor E3 Low pressure sensor E4 Piping temperature sensor E5 Moisture sensor

Claims (2)

In a fluid recovery / regeneration / filling apparatus for charging the vehicle air conditioner with the recovered / regenerated refrigerant after performing a recovery / regeneration step of recovering and regenerating the refrigerant from the vehicle air conditioner,
A diagnostic means for determining whether the vehicle air conditioner is in a normal state or an abnormal state before the recovery and regeneration step and displaying a determination result;
The diagnostic means includes an outside air temperature sensor (E1) for measuring the outside air temperature, a high pressure side pressure sensor (E2) for measuring the pressure in the high pressure side pipe of the vehicle air conditioner, and the vehicle air conditioner. A low pressure side pressure sensor (E3) for measuring the pressure in the low pressure side pipe,
The diagnostic means performs a normal value range determination process for determining a predetermined high pressure normal value range and a predetermined low pressure normal value range according to the outside air temperature based on the measurement result of the outside air temperature sensor (E1), and When the pressure in the low pressure side pipe of the vehicle air conditioner is lower than the predetermined low pressure normal value range and the pressure in the high pressure side pipe of the vehicle air conditioner is lower than the predetermined high pressure normal value range, It is judged and displayed as a caution state that there is a possibility that it can be improved by recovering and recharging the above refrigerant ,
The diagnostic means includes a moisture sensor (E5) for detecting whether or not there is condensation on the surface of the low-pressure side pipe,
Further, the diagnosis means is configured such that the pressure in the low pressure side pipe of the vehicle air conditioner is higher than the predetermined low pressure normal value range, and the pressure in the high pressure side pipe of the vehicle air conditioner is the predetermined high pressure normal value. When it is higher than the range, when it is determined that there is no condensation on the surface of the low-pressure side pipe based on the detection result of the moisture sensor (E5), it is determined as the caution state and displayed. Filling equipment. The diagnostic means includes a display unit (5) for visualizing the determination result,
The display unit (5) includes a first lamp (51) that lights or blinks when the normal state is determined, a second lamp (52) that lights or blinks when the attention state is determined, and the abnormality The fluid recovery / regeneration / filling device according to claim 1 , further comprising a third lamp (53) that lights or blinks when it is determined to be in a state .

Images